19.2.4 - Exotic Accelerants. Mixtures of fuels and Class 3 or Class 4
oxidizers may produce an exceedingly hot fire and may be used
to start or accelerate a fire. Thermite mixtures also produce
exceedingly hot fires. Such accelerants generally
leave residues that may be visually or chemically identifiable.
Exotic accelerants have been hypothesized as having
been used to start or accelerate some rapidly growing
fires and were referred to in these particular instances
as high temperature accelerants (HTA).
Indicators of
exotic accelerants include an exceedingly rapid rate of fire
growth, brilliant flares (particularly at the start of the fire),
and melted steel or concrete. A study of 25 fires suspected of
being associated with HTAs during the 1981-1991 period revealed that
there was no conclusive scientific proof of the use of such HTA.
In any fire where the rate of fire growth is considered exceedingly
rapid, other reasons for this should be considered in addition to the use
of an accelerant, exotic or otherwise. These reasons include ventilation,
fire suppression tactics, and the type and configuration of the fuels.
you might remember this one...you posted it here
http://www.internationalskeptics.com/forums/showthread.php?t=183072
Regardless, NIST was told that many people (fire fighters, clean up crew, Les Robertson himself (you know him don't ya beach?)) indicated they saw molten steel and they seemed to be uninterested in checking this out even though they knew that the fires should not have caused it.